This change was pushed forward by the development of heavier naval guns ( the ironclads of the 1880s carried some of the heaviest guns ever mounted at sea ), more sophisticated steam engines, and advances in metallurgy which made steel shipbuilding possible.

This change was pushed forward by the development of heavier naval guns ( the ironclads of the 1880s carried some of the heaviest guns ever mounted at sea ), more sophisticated steam engines, and advances in metallurgy which made steel shipbuilding possible.

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